Wikipedia:Mandalay happen to be real thing, friend. And although it's deep inland, Wikipedia:Irrawaddy River pass it.
But yeah, it's more likely to be Manta Ray, since Japanese Wikipedia write it as マンタレイ, not マンダレー. Citing 機動戦士ガンダム モビルスーツバリエーション 1 ザク編 --My girlfriend is a loli. 03:32, July 9, 2017 (UTC)